205541103135 has 16 divisors (see below), whose sum is σ = 330518361600. Its totient is φ = 109071056160.

The previous prime is 205541103121. The next prime is 205541103211. The reversal of 205541103135 is 531301145502.

It is not a de Polignac number, because 205541103135 - 2⁹ = 205541102623 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34426011 + ... + 34431980.

It is an arithmetic number, because the mean of its divisors is an integer number (20657397600).

Almost surely, 2^205541103135 is an apocalyptic number.

205541103135 is a deficient number, since it is larger than the sum of its proper divisors (124977258465).

205541103135 is a wasteful number, since it uses less digits than its factorization.

205541103135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68858198.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 205541103135 its reverse (531301145502), we get a palindrome (736842248637).

The spelling of 205541103135 in words is "two hundred five billion, five hundred forty-one million, one hundred three thousand, one hundred thirty-five".